Since the beginning of this year, Let’s Encrypt rolled out a new shortlived profile for certificates that make them valid for only 160 hours. The intention, as they say, is to encourage automation and reduce the window of certificate compromise (because revocation is somewhat a flakey thing).
Yet, I haven’t seen a lot of news about it since then. Hence the question: is this shorter cert thingy something you considered and deployed for your homelab?
As for me I’ve set up lego-acme with profile: "shortlived" on my rig. Lego runs on a bihourly cronjob, but only renews when a cert has >=3 days to expiry. It’s been pretty much a set-and-forget experience, although some more monitoring would be nice.
I had no idea “single use certificates” were a thing. It makes sense, although from my personal perspective I have always worked with managed identities and privilege escalation.
I have almost no internet facing services, although the two I have I might swap for the short lived variants. As you said, risk of misuse due to compromise goes down so that makes sense.
For my other services, they are all running on HTTPS, but only available internally over LAN or VPN, all with isolated VLANs sort of like a Hub Spoke model. The two certs that are internet facing are basically for getting access to my VPN. Might swap the internal services to short lived anyway if the automation works well, as I said before, it’s fully automated anyway.